Pokémon FireRed Version (ポケットモンスターファイアレッド Pocket Monsters Firered) and Pokémon LeafGreen Version (ポケットモンスターリーフグリーン Pocket Monsters Leafgreen) are remakes of the Red and Blue games. These games, like the original, take place in the Kanto region and also includes the Sevii Islands which were not in the original. Though these games are remakes of the Generation I games, they are considered to be Generation III games, now with better graphics and many new features.

Pokémon can now evolve into forms available in other generations, with the exception of Pokémon such as Umbreon and Espeon. While these Pokémon can still reach maximum happiness, as there is no internal clock in FR/LG, the game is unable to determine what time it is, and as such is unable to evolve Eevee based on the time of day.

Elite Four and Champion

Trivia

The mysterious truck near the SS Anne makes another appearance in the FireRed and LeafGreen games. This time around Strength can actually be used on it and the player receives a Lava Cookie.

In the Pewter Museum, the model space shuttle has been renamed from Space Shuttle Columbia from Generation I to Space Shuttle. The Columbia was destroyed in a tragic explosion before the game's release on February 1, 2003. This name was kept in the Japanese version, but was removed in the localized versions.

These games are by far the only Pokémon games that shows commercials of it a year after it was made.

Although it wasn't released outside of Japan, Green was still remade, making Western players confused, since Pokémon Red and Blue was released in Northern America and Europe instead of Pokémon Green.